Limits in AWS CloudTrail

The following table describes limits within CloudTrail. CloudTrail has no adjustable
limits. For
information about other limits in AWS, see AWS Service
Limits.

Resource

Default Limit

Comments

Trails per region

5

This limit cannot be increased.

Get, describe, and list APIs

10 transactions per second (TPS)

The maximum number of operation requests you can make per second without being
throttled. The LookupEvents API is not included in this category.

This limit
cannot be increased.

All other APIs

1 transaction per second (TPS)

The maximum number of operation requests you can make per second without being
throttled.

This limit cannot be increased.

Event selectors

5 per trail

This limit cannot be increased.

Data resources in event selectors

250 across all event selectors in a trail

The total number of data resources cannot exceed 250 across all event selectors in
a
trail. The limit of number of resources on an individual event selector is configurable
up to
250. This upper limit is allowed only if the total number of data resources does not
exceed
250 across all event selectors.

Examples:

A trail with 5 event selectors, each configured with 50 data resources, is allowed.
(5*50=250)

A trail with 5 event selectors, 3 of which are configured with 50 data resources,
1 of
which is configured with 99 data resources, and 1 of which is configured with 1 data
resource, is also allowed. ((3*50)+1+99=250)

A trail configured with 5 event selectors, all of which are configured with 100 data
resources, is not allowed. (5*100=500)